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CertDB
CertDB

Top issuers

The most active issuers of SSL certificates in the world. Full list of issuers, actual counts of signed certificates.

# Issuer Certificate count
201 Verizon Cybertrust Security 2 357
202 Heroku Inc. 2 357
203 TC TrustCenter GmbH 2 353
204 AusCERT 2 324
205 Radware 2 317
206 nazwa.pl sp. z o.o. 2 315
207 Hillstone Networks, Inc. 2 308
208 RADIX Co. ,Ltd. 2 296
209 DOMENY.PL sp. z o.o 2 275
210 Universitaet Stuttgart 2 271
211 Sillal Co. 2 238
212 SEIKO EPSON CORP. 2 196
213 Zeroshell.net 2 188
214 Xirrus, Inc. 2 187
215 OCC 2 185
216 Digi-Sign Limited 2 179
217 MOBOTIX AG 2 175
218 Positive Software 2 162
219 DigitalChina Networks Limited 2 160
220 Sutus, Inc. 2 152
221 Buypass AS-983163327 2 100
222 AffirmTrust 2 090
223 TP-LINK Technologies CO., LTD. 2 082
224 example 2 063
225 McAfee, Inc. 2 013
226 Vodafone Group 1 960
227 HydrantID (Avalanche Cloud Corporation) 1 957
228 ICP-Brasil 1 952
229 System X 1 944
230 Intel Corporation 1 936
231 CrossTrust 1 915
232 Beijing Topsec Network Security Technology Co., Ltd. 1 912
233 KPN Corporate Market BV 1 899
234 Rede Nacional de Ensino e Pesquisa - RNP 1 842
235 TCS Basys Controls 1 840
236 DMX.com 1 826
237 Linksys 1 779
238 Positive Software Corporation 1 765
239 Riverbed Technology 1 753
240 Sophos PLC 1 752
241 Lexmark Int. 1 742
242 Cerberus FTP Server 1 723
243 ZyXEL 1 716
244 - 1 714
245 Deutsche Post 1 706
246 AC Camerfirma S.A. 1 667
247 Telecom Italia Trust Technologies S.r.l. 1 664
248 Lauritz Knudsen 1 657
249 Blue Coat SG900 Series 1 623
250 CA 1 613
251 TAIWAN-CA INC. 1 606
252 Lightspeed Systems 1 603
253 Company 1 598
254 Panasonic System Networks Co.,Ltd. 1 597
255 Organization Name 1 594
256 na 1 590
257 TeliaSonera 1 577
258 QuoVadis Trustlink BV 1 574
259 iXsystems, Inc. 1 573
260 Ingrasys 1 569
261 Site Blindado S.A. 1 550
262 Dell 1 544
263 I-O DATA DEVICE, INC. 1 543
264 KPN B.V. 1 531
265 INTEC INC. 1 524
266 Test 1 515
267 Swiss Government PKI 1 479
268 Parallels, Inc. 1 478
269 Fraunhofer 1 465
270 GlobalSign 1 457
271 INSYS Microelectronics GmbH 1 430
272 HID Engineering 1 425
273 Pannaway Technologies 1 423
274 Alpha 1 416
275 Wells Fargo 1 409
276 DHIMYOTIS 1 392
277 JumpBox 1 386
278 Aegir 1 385
279 Blue Coat SG9000 Series 1 375
280 Avaya 1 372
281 DOMENY.PL Ltd. 1 333
282 D-Trust GmbH 1 332
283 Acquia, Inc. 1 328
284 LifeSize Communications Inc. 1 328
285 Max-Planck-Gesellschaft 1 315
286 Infoblox 1 310
287 Open - E 1 289
288 SGssl 1 273
289 Big Horn County School District #2 1 239
290 DFN-Verein 1 235
291 Hetzner Online AG 1 234
292 Hongkong Post 1 225
293 Chunghwa Telecom Co., Ltd. 1 210
294 RU-Center 1 208
295 Linksys, LLC. 1 208
296 ADVA Optical Networking 1 197
297 Snom Technology AG 1 191
298 Blue Mind 1 186
299 AnsibleWorks 1 179
300 localhost 1 165
301 RSA Data Security, Inc. 1 161
302 CommuniGate Systems, Inc. 1 148
303 ATX 1 128
304 LPS 1 127
305 Unify 1 107
306 Dis 1 089
307 Sophos 1 088
308 NAS 1 080
309 NetArt Spółka Akcyjna S.K.A. 1 037
310 行政院 1 034
311 DahuaTech 1 032
312 rutorrent 1 026
313 Certinomis 1 009
314 Recruit Holdings Co.,Ltd. 996
315 Blue Coat SG300 Series 995
316 Aetna Inc 987
317 Apache secure server 978
318 Abocom, Ltd 971
319 Generated by OnApp Control Panel installer (http://onapp.com) 970
320 AxGate 967
321 Alarm.com 964
322 Cloud Engines, Inc. 942
323 Netbox Blue Pty Ltd 937
324 Spondoolies-tech 935
325 m0n0wall 931
326 Freistaat Bayern 928
327 Nestle 909
328 LG CNS 895
329 PBXware 888
330 Pivotal 884
331 Viprinet 877
332 Vejdirektoratet, VI 876
333 Icon Time Systems 870
334 ATT Services Inc 867
335 Comodo Limited 867
336 Siemens AG 863
337 SecWorld 857
338 Stalker Software, Inc. 854
339 Honeywell 848
340 VMware 847
341 Avigilon Corporation 842
342 Aruba Networks, Inc. 838
343 Seagate Technology LLC 835
344 Agencia Catalana de Certificacio (NIF Q-0801176-I) 834
345 SAP Trust Community 833
346 Eaton 832
347 Regionales Hochschulrechenzentrum Kaiserslautern 830
348 Foo Bar, Inc 826
349 FIDUCIA & GAD IT AG 809
350 ArrayNetworks Inc. 808
351 Barracuda Networks 808
352 admin 807
353 Splunk 803
354 Medstrat 799
355 Netcredence 795
356 NewMedia-NET GmbH 786
357 Pexip Infinity Temporary Certificate 784
358 Organization 773
359 MyOrganization 772
360 Ubuntu 758
361 Exinda Networks 756
362 RU-Center (ЗАО Региональный Сетевой Информационный Центр) 742
363 BUFFALO 742
364 Blue Coat SG810 Series 740
365 OCOSA 735
366 K Software 734
367 NetModule 731
368 CertCenter AG 731
369 EMC 728
370 Technische Universitaet Muenchen 727
371 Viprinet Europe GmbH 720
372 IP Brick 719
373 Certplus 709
374 RWTH Aachen 708
375 HDE 707
376 TrustSign Certificadora Dig. & Soluções Segurança da Inf. Ltda. 706
377 Ingersoll-Rand Company 700
378 Swisscom 698
379 JSC Regional Network Information Center 697
380 LuCId Keymaster 697
381 Big Corp 697
382 yourcompany 695
383 Education and Manpower Bureau 691
384 NexG 691
385 NTT DOCOMO, INC. 691
386 InfoCert SpA 690
387 ScrolloutF1 688
388 Blue Coat SG510 Series 688
389 Universitaet Freiburg 682
390 DE 681
391 N/A 680
392 Shenyang Neusoft Systems Integration Co., Ltd. 676
393 4PSA 672
394 nazwa.pl S.A. 668
395 Control Panel Server 667
396 Microsec Ltd. 661
397 Mocana Corporation 659
398 Personal 655
399 Avocent Corporation 653
400 MULTICERT - Serviços de Certificação Electrónica S.A. 652